ATTACHED AND UNATTACHED FRACTIONS OF SHORT-LIVED RADON DECAY PRODUCTS IN OUTDOOR ENVIRONMENTS: EFFECT ON THE HUMAN RESPIRATORY SYSTEM

被引：9
|
作者：
Amrane, M. [1 ]
Oufni, L. [2 ]
Misdaq, M. A. [1 ]
机构：
[1] Univ Cadi Ayyad, Fac Sci Semlalia, Nucl Phys & Techn Lab, Marrakech, Morocco
[2] Univ Sultan Moulay Slimane, Dept Phys, Fac Sci & Tech LPMM ERM, Beni Mellal 23000, Morocco
来源：
RADIATION PROTECTION DOSIMETRY | 2014年 / 162卷 / 03期
关键词：
NATURAL MATERIAL SAMPLES; DETECTION EFFICIENCIES; HUMIDITY; THORIUM; URANIUM; THORON; SSNTD; AIR;
D O I：
10.1093/rpd/nct338
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The authors developed a model for determining the alpha- and beta-activities per unit volume of air due to radon (Rn-222), thoron (Rn-220) and their decay products attached and unattached to the aerosol in the outdoor air at the workplace in natural conditions at different locations in Morocco by using both CR-39 and LR-115 type II solid-state nuclear track detectors. In addition, the percentage of Po-218, Pb-214 and Po-214 radionuclides attached to the aerosols and the unattached fraction f(j) for different values of the attachment rate were evaluated. Radon and thoron concentrations in outdoor air of the studied different locations were found to vary from 9.20 +/- 0.8 to 16.30 +/- 1.50 Bq m(-3) and 0.22 +/- 0.02 to 1.80 +/- 0.20 Bq m(-3), respectively. The committed equivalent doses due to the radon short-lived progeny Po-218 and Po-214 attached and unattached to the aerosol air were evaluated in different tissues of the respiratory tract of the members of the public from the inhalation of outdoor air.
引用
收藏
页码：400 / 409
页数：10
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